n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 22 |
6 | 54 |
7 | 192 |
8 | 496 |
9 | 1722 |
10 | 4799 |
11 | 17013 |
12 | 48362 |
13 | 169458 |
14 | 498733 |
15 | 1776570 |
16 | 5331037 |
17 | 18608396 |
18 | 57109292 |
19 | 201213331 |
20 | 625146398 |
21 | 2176243724 |
22 | 6873338754 |
23 | 24052502138 |
24 | 76626395556 |
25 | 265774736523 |
26 | 856909651252 |
27 | 2979519037203 |
28 | 9675077715466 |
29 | 33455355338926 |
30 | 109591055905415 |
[1,1,3,7,22,54,192,496,1722,4799,17013,48362, 169458,498733,1776570,5331037,18608396,57109292, 201213331,625146398,2176243724,6873338754, 24052502138,76626395556,265774736523,856909651252, 2979519037203,9675077715466,33455355338926, 109591055905415] |